I have a three vessel e-herms Kal clone with keggles. I have brewed on this system for just over two years now. But I started on the stove 16 years ago and progressed from there. I really love my new rig but I was already brewing for many years and knew I wanted to upgrade. Might be expensive to go all out right away unless you have brewed for a little while, love it, and want to upgrade your system. The cooler mash tun, with a boil kettle and turkey fryer systems work well also. I think the skill comes in on how well you brew on your particular system and how you dial it in. Then you know how to maximize the full potential of your rig and get the best wort out of it consistently. The great thing about my rig is that everything is held at the right temp and is easily kept there, and is very repeatable when you brew the same recipe again. There really is an art in brewing though like good chefs. You can give five people the same recipe and they will not all brew the same beer. The brewer does have talent so to speak and how he or she makes their rig perform. I also am a believer in what others have said. Any good brewer can make good sugar water (wort) but the yeast make the beer. You have to make healthy starters, use yeast nutrient, oxygenate the wort properly, and control the fermentation temps in the very narrow range that is perfect for each particular yeast strain. BIAB is a great way to get into all grain brewing also and is more affordable for a basic BIAB system compared to a three vessel e-herms with a control box. Good luck on whatever you decide to go with.
John